Coulomb's law, or Coulomb's inverse-square law, is a law o pheesics describin the electrostatic interaction atween electrically charged pairticles. The law wis first published in 1785 by French pheesicist Charles Augustin de Coulomb an wis essential tae the development o the theory o electromagnetism. It is analogous tae Isaac Newton's inverse-square law o universal gravitation. Coulomb's law can be uised tae derive Gauss's law, an vice versa. The law haes been testit hivily, an aw observations hae upheld the law's principle.